Tavares, T.R., Fiorio, P.R., Martello, M., Strabeli, T.F. and Barros, P.P. da S. 2015. Observation of the Normalized Difference Vegetation Index (NDVI) of different types of native vegetation in the dry season of 2011 and 2014 , in Piracicaba -SP. Revista Hipótese. 1, 2 (May 2015), 77–91.